Milestone



UNTTED STATES PATENT OFFICE.

JOSEPH H. BURROWS, OF CINCINNATI, OHIO.

MILLSTONE.

Specicaton of Letters Patent No. 2,581, dated. April 28, 1842.

To all whom t may concern Be it known that I, Josnrrr H. Bmmows, of Cincinnati, in the county of Hamilton and State of Ohio, have invented a new and useful Improvement in the Construction of Upper Millstones, sometimes called Runners; and I do hereby declare that the fol lowing is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawings, making a part of this specification, in whichi a, (a, is a center cross section of the back with its ange or rim, and is made of cast iron, or other metal, and of a size and thickness corresponding with the intended size and weight of the proposed millstone, the rim serving for the upper band or hoop of the stone (Z, An opening is made inthe center of the back e, e, corresponding with the eye or bush Z), b, which is also made of cast iron or other metal and of larger eX- ternal diameter at the bottom than at the top, thereby forming a circular dovetail. Several, say three or four, small holes are made in the back near its circumference to receive weights, if necessary, to balance the stone. 'The eye is secured to the back by bolts c, c, or in other suitable manner, or it maybe cast in one piece with the back,

and firmly holds the stones, which are fitted to it, in their' place. In the eye, suitable openings or gains are made, to receive the driver and balance rind. The stone is then hooped, finished, and used in the usual manner.

I do not claim as invented by me, the loading of a millstone with metal or other substance, or the use of a metallic eye or bush for the same; but- VVhat I do claim as my invention, and desire to secure by Letters Patent, is-

The manner of constructing the metallic plate or back in one solid piece, with its flange or rim, which rim forms the upper band or hoop of the stone; and also the manner of constructing the eye or bush so as to be of larger external diameter at its bottom than at its top, thereby forming a circular dovetail to secure the stone in its place, in combination with the manner of securing the eye to the back by bolts or otherwise so as to form a firm and substantial stone; the whole being p ut together and combined in the manner substantially set forth.

JOSEPH H. BURROVS. lVitnesses:

A. It. CHASE, SAM W. DAVIES. 

